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CFI: Fix SIGILL reached via trait objects

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Fix #106547 by transforming the concrete self into a reference to a
trait object before emitting type metadata identifiers for trait
methods.
This commit is contained in:
Ramon de C Valle 2023-05-03 22:22:24 +00:00
parent eac35583d2
commit 7c7b22e62c
10 changed files with 247 additions and 28 deletions
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2
compiler/rustc_codegen_llvm/src/intrinsic.rs
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@ -772,7 +772,7 @@ fn gen_fn<'ll, 'tcx>(
) -> (&'ll Type, &'ll Value) {
let fn_abi = cx.fn_abi_of_fn_ptr(rust_fn_sig, ty::List::empty());
let llty = fn_abi.llvm_type(cx);
let llfn = cx.declare_fn(name, fn_abi);
let llfn = cx.declare_fn(name, fn_abi, None);
cx.set_frame_pointer_type(llfn);
cx.apply_target_cpu_attr(llfn);
// FIXME(eddyb) find a nicer way to do this.